[Tutor] Sudoku

Hugo Arts hugo.yoshi at gmail.com
Sun Sep 23 13:28:39 CEST 2012

On Sun, Sep 23, 2012 at 12:08 PM, myles broomes
<mylesbroomes at hotmail.co.uk>wrote:

> I'm currently coding a Sudoku clone but I'm having trouble displaying the
> board:
> # Sudoku
> # Sudoku is a logic-based number-placement puzzle
> # The objective is to fill a 9×9 grid with digits so that each column,
> each row, and each of the nine 3×3 sub-grids that compose the grid contains
> all of the digits from 1 to 9
> import random
> def new_board():
>     """Creates the game board. """
>     board=[]
>     for i in range(9):
>         column=[]
>         for j in range(9):
>             column.append(i)
>         board.append(column)
>     return board
> def display_board(board):
>     """Display game board on screen."""
>     for i in range(9):
>         for j in range(9):
>             rand_num=random.randint(0,9)
>             if rand_num not in board[i]:
>                 board[i][j]=rand_num
>             else:
>                 board[i][j]=' '
>             print(board[i][j],"|")
> # assign the new board to a variable and display it on the screen
> game_board=new_board()
> display_board(game_board)
> I cant think of a way to get each column in the for loop (board[i]) to
> print side by side. Any help would be much appreciated.

Which version of python are you using? In python 2.x, you can prevent print
from adding a newline at the end by appending a comma, like this:

print board[i][j], "|",

in python 3.x, the print function takes an "end" argument which does the
same thing:

# default for end is "\n", but here we force no end character
print(board[i][j], "|", end="")

this way you can print multiple things on a single line. Now the only other
thing you need to do is add a single newline after you print a single row.
You can do that with just an empty print() call (or print statement in
python 2.x)

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